Transue-Lecture4 - Circular area z-line structure in the...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Circular area , z-line, structure in the middle, which is n-line myson filament extends to other side The arrangement of thick and thin myofilmanets form light and dark alternationg bands (striations) o Thin filaments (light) ; actin (z-line runs through middle of it) o Thick filaments (myosin) o H-zone is somewhat lighter area in middle o Either one contract during a sarcomere contraction Sarcomere cx o One myosin is going ot interact with multiple actins (thin filaments) fig 38-8a p 737 How does a muscle contract? o Or…How does a sarcomere shorten o Sliding filament model Fibers slide so area of thin and thick filament overlap increases Filament size does not change! o By do filaments slide? Use fig 38-10 p738 ADAM – sliding filament theory Myosin action Low energy conformation – High energy when ATP binds Myson gets close to actin and binds to actin o Actin’s Role: Tropomyosin – long filamentous protein, lying over the binding site that
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern